/// <summary>
/// Add a function to the filter
/// will determine if this function has dynamic parameters of data[] only, or data[] and sampling_rate
/// </summary>
static void AddSignalFilterFunction(SignalFilter filter, MethodInfo mi, Dictionary <string, string> paramDict, object[] parameters)
{
if (paramDict.ContainsKey("sampling_rate"))
{
filter.AddFunction(new SignalFilterFunctionDataSampleRate(typeof(DataFilter).Assembly, mi, parameters));
}
else
{
filter.AddFunction(new SignalFilterFunctionData(typeof(DataFilter).Assembly, mi, parameters));
}
}
/// <summary>
/// Create a default filter for 60Hz mains noise
/// </summary>
static void CreateDefaultFilterNotch50()
{
var newFilter = new SignalFilter("default50");
MethodInfo mi = typeof(DataFilter).GetMethod("perform_bandstop", BindingFlags.Public | BindingFlags.Static);
var paramDict = new Dictionary <string, string>
{
["data"] = "",
["sampling_rate"] = "0",
["center_freq"] = "50.0",
["band_width"] = "2.0",
["order"] = "6",
["filter_type"] = "1",
["ripple"] = "1.0"
};
// create object array from parameters, casting to proper type
object[] parameters = mi.GetParameters().Select(p => paramDict[p.Name].Length > 0 ? Convert.ChangeType(paramDict[p.Name], p.ParameterType) : null).ToArray();
newFilter.AddFunction(new SignalFilterFunctionDataSampleRate(typeof(DataFilter).Assembly, mi, parameters));
mi = typeof(DataFilter).GetMethod("perform_bandpass", BindingFlags.Public | BindingFlags.Static);
paramDict = new Dictionary <string, string>
{
["data"] = "",
["sampling_rate"] = "0",
["center_freq"] = "25.5",
["band_width"] = "47",
["order"] = "2",
["filter_type"] = "0",
["ripple"] = "0.0"
};
// create object array from parameters, casting to proper type
parameters = mi.GetParameters().Select(p => paramDict[p.Name].Length > 0 ? Convert.ChangeType(paramDict[p.Name], p.ParameterType) : null).ToArray();
newFilter.AddFunction(new SignalFilterFunctionDataSampleRate(typeof(DataFilter).Assembly, mi, parameters));
mi = typeof(DataFilter).GetMethod("perform_wavelet_denoising", BindingFlags.Public | BindingFlags.Static);
paramDict = new Dictionary <string, string>
{
["data"] = "",
["wavelet"] = "db12",
["decomposition_level"] = "3",
};
// create object array from parameters, casting to proper type
parameters = mi.GetParameters().Select(p => paramDict[p.Name].Length > 0 ? Convert.ChangeType(paramDict[p.Name], p.ParameterType) : null).ToArray();
newFilter.AddFunction(new SignalFilterFunctionData(typeof(DataFilter).Assembly, mi, parameters));
Filters.Add(newFilter.Name, newFilter);
}